I'll agree with the above.
My first three haircuts in Germany where at the German girlfriends swanky Italian hair salon. All I wanted was a short back and sides with the (thinning) top combed back (a la Jack Nicholson). Would he use an electric razor and shave (grade 3) two inches above the ears and follow it down and across the collar neckline? Nope. 60mins with scissors and comb. All for 26 euros.
Then, shopping at my local Marktkauf I saw the
Klier concession. After a few walk pasts on the next shopping visits I guessed the oldest member of staff was 30ish so assumed everyone would speak some English. Subsequently, I turned up by myself.
We spoke in basic German and basic English and hand gestures (c'mon! It's a hairdressers!) but still managed to communicate very effectively. It took her only 15mins and I finally got my first decent (exactly how I wanted it - electric razors a-go-go) haircut in Germany.
And at 14 euros, I'll be back in 6 weeks.
PS: See the Klier site for Hamburg. Again they appear to be at the supermarkets.